Here's what I have tested so far: Terrain Paint: New Paint Layer- OK Slope Mask- OK AutoPaint- OK Forest Paint: Brush follows terrain- OK Error when trying to paint trees- ../Engine/source/math/mathUtils.cpp(326,0): {Fatal} - MathUtils::randomPointInRadius - something is wrong, should not fail this many times. When I try to paint trees, I get an error dialog. If I press Ignore, I get one tree. If I press Debug, or Exit, T3D closes. Scene Tree: UI locks up when trying to name Basic Clouds (Global u) I can name the Basic Clouds something without a "u" in the name Cloud Layer works, but I cannot name it anything with a "u" in the name Ground Cover works. Applied new texture OK Cannot drag items from the Library to the scene. I can only add objects if I double click the Library item. Terrain Editor: All brushes seem to work Object Import: DAE with textures OK